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Study of the structure and physical properties of thermoelectric BiSbTe alloys
- Publication Year :
- 2022
- Publisher :
- СанкÑ-ÐеÑеÑбÑÑгÑкий полиÑÐµÑ Ð½Ð¸ÑеÑкий ÑнивеÑÑиÑÐµÑ ÐеÑÑа Ðеликого, 2022.
-
Abstract
- Тема вÑпÑÑкной квалиÑикаÑионной ÑабоÑÑ: «ÐÑÑледование ÑÑÑÑкÑÑÑÑ Ð¸ ÑизиÑеÑÐºÐ¸Ñ ÑвойÑÑв ÑеÑмоÑлекÑÑиÑеÑÐºÐ¸Ñ Ñплавов BiSbTe». ÐÐ°Ð½Ð½Ð°Ñ ÑабоÑа поÑвÑÑена иÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÑÑÑкÑÑÑÑ Ð¸ ÑизиÑеÑÐºÐ¸Ñ ÑвойÑÑв ÑеÑмоÑлекÑÑиÑеÑÐºÐ¸Ñ Ñплавов BiSbTe. Ð Ñ Ð¾Ð´Ðµ иÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð±Ñли вÑÑÐ²Ð»ÐµÐ½Ñ ÑледÑÑÑие задаÑи: 1. ÐÑоведение Ñазового анализа Ñ Ð°ÑакÑеÑнÑÑ Ð·Ð¾Ð½, а Ñакже ÑÑемка пÑи диÑкÑеÑном вÑаÑении обÑазÑа. 2. ÐÑÑледование взаимоÑвÑзи меÑаллогÑаÑиÑеÑкого анализа и Ñазового ÑоÑÑава маÑеÑиала. 3. ÐÑÑвление Ð·Ð¾Ð½Ñ Ñ Ð²ÑÑокой и низкой диÑпеÑÑноÑÑÑÑ Ð¿Ð¾ ÑеÑÐµÐ½Ð¸Ñ ÑкÑÑÑÑдиÑованного обÑазÑа. 4. УÑÑановление взаимоÑвÑзи напÑÑженно-деÑоÑмиÑованного ÑоÑÑоÑÐ½Ð¸Ñ Ð¼Ð°ÑеÑиала и ÑоÑмиÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑазлиÑнÑÑ ÐºÑиÑÑаллогÑаÑиÑеÑÐºÐ¸Ñ ÑекÑÑÑÑ Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ Ð¼Ð°ÑемаÑиÑеÑкого моделиÑование. ÐÐ»Ñ ÑеÑÐµÐ½Ð¸Ñ Ð¿Ð¾ÑÑавленнÑÑ Ð·Ð°Ð´Ð°Ñ Ð±Ñло пÑоведено ÑÑд ÑизиÑеÑÐºÐ¸Ñ Ð¸ маÑемаÑиÑеÑÐºÐ¸Ñ Ð¸ÑÑледований: ÑазовÑй ÑоÑÑав Ñ Ð°ÑакÑеÑнÑÑ Ð·Ð¾Ð½, ÑÑемка пÑи диÑкÑеÑном вÑаÑении обÑазÑа, меÑаллогÑаÑиÑеÑкий анализ, маÑемаÑиÑеÑкое моделиÑование пÑоÑеÑÑа ÑкÑÑÑÑзии меÑодом конеÑнÑÑ ÑлеменÑов и иÑÑледование ÑеÑмоÑлекÑÑиÑеÑÐºÐ¸Ñ ÑвойÑÑв маÑеÑила зондовÑм меÑодом. ÐолÑÑеннÑе ÑезÑлÑÑаÑÑ Ð¿Ð¾Ð·Ð²Ð¾Ð»Ð¸Ð»Ð¸ ÑÑоÑмиÑоваÑÑ Ð³Ð»Ð°Ð²Ð½Ñй вÑвод о Ñом, ÑÑо ÑÑÑÑкÑÑÑа ÑкÑÑÑÑдиÑÑемого пÑÑÑка Ð¸Ð¼ÐµÐµÑ Ð½ÐµÐ¾Ð´Ð½Ð¾Ñодное ÑаÑпÑеделение ÑеÑмоÑлекÑÑиÑеÑÐºÐ¸Ñ ÑвойÑÑв по ÑеÑениÑ, обÑÑловленное неодноÑодноÑÑÑÑ Ð½Ð°Ð¿ÑÑженно-деÑоÑмиÑованного ÑоÑÑоÑÐ½Ð¸Ñ Ð¸ ÑазоÑиенÑиÑовкой кÑиÑÑаллиÑов.<br />The topic of the final qualifying work: "Study of the structure and physical properties of thermoelectric BiSbTe alloys". This work is devoted to the study of the structure and physical properties of thermoelectric BiSbTe alloys. During the study, the following tasks were identified: 1. Conducting phase analysis of characteristic zones, as well as shooting with discrete rotation of the sample. 2. Investigation of the relationship between metallographic analysis and the phase composition of the material. 3. Identification of zones with high and low dispersion along the section of the extruded sample. 4. Establishing the relationship between the stress-strain state of the material and the formation of various crystallographic structures using mathematical modeling. To solve the tasks set, a number of physical and mathematical studies were carried out: the phase composition of characteristic zones, shooting with discrete rotation of the sample, metallographic analysis, mathematical modeling of the extrusion process by the finite element method and investigation of the thermoelectric properties of the material by the probe method. The results obtained made it possible to form the main conclusion that the structure of the extruded rod has an inhomogeneous distribution of thermoelectric properties over the cross section, due to the heterogeneity of the stress-strain state and the disorientation of the crystallites.
Details
- Language :
- Russian
- Database :
- OpenAIRE
- Accession number :
- edsair.doi...........06f0a97f8d5d781d5b27d3b1088165ce
- Full Text :
- https://doi.org/10.18720/spbpu/3/2023/vr/vr23-1098